Indicating, recording, and integrating dynamometer.



w. J. GROWELL, JR. INDIGATING, RECORDING, AND INTEGRATING DYNAMOMETER.

APPLICATION I'ILBID MAILB, 1909.

Patented Jan. 11, 1910.

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UNITED STATESEfATENT OFFICE.

WILLIAM J. GROW'EL'L, JR., OF LEBANON, PENNSYLVANIA.

INDICATING, RECORDING, AND INTEGRATING DYNAMOME'IER.

I and the shaft B, causes the said second bush- Be it known that I, WILLIAM J. GRowELL, 1

To all whom it mag concern:

Jr., a citizen of the United States, residing at Lebanon, in the county of Lebanon and State of Pennsylvania, have mvented new and useful Improvements in Indicating, Re-

cording, and Integrating Dynamometers, of which the following is a specification.

My invention is a dynamometer that does not receive, either to consume or to transmit, the power which it measures, continuously records, or integrates. )Vith the aid of a spring-coupling between two revolving shafts, it gives to an auxiliary wheel a turning velocity proportional at the same time both to the common shaft velocity and to the torsion between the two said coupled-to gether shafts, and consequently a turning velocity proportional to the power transmitted from one of said shafts to the other; and by measuring the turning velocity of this auxiliary wheel, in any suitable way, it gives, with proper calibration, a measure of the power transmitted at time of said measurement from one of said shafts to the other; and by continuously recording, in any suitable way, the velocity of this auxiliary wheel it gives, with proper calibration, a continuous record of the power transmitted from one of said shafts to the other; and by in tegrating, in any suitable way with a revolution counter), the velocity of said auxiliary wheel during any period 6., by determining the total revolutions of said auxiliary wheel during said period) it gives, with proper calibration, the total energy (6. 9., in horse power hours) transmitted from one of said shafts to the other during said period. Following is a specific description of a preferable form of apparatus to give, with the aid of said spring-coupling, a turning velocity to said auxiliary wheel proportional both to shaft velocity and to sha t torsion, and therefore to shaft power transmission. y

The drawing represents a horizontal sectional view of the apparatus.

In the drawing, A and B, are two shafts, in line, and coupled together by the said spring-coupling G.

D is a bushing fixed to the shaft B, and having on its outer surface a screw thread of large uniform pitch meshing into a corresponding screw thread on the inner surface of a second bushing or nut, E. A relative turning of the second bushing or nut E Specification of Letters Patent.

Application filed March 5, 1909.

Patented Jan. '11, 1910. Serial No. 481,513.

H and I, lit into slots J and K in a bushing U upon the shaft A, the arrangement being such as to prevent any relative turning between-shaft A and the said second bushing or nut E, but not to prevent any rectilinear motion of the said second bushing or nut E along shaft B, the said outer ends, H and I,

of said arms F and G, in such case sliding in the slots J and K.

A torsion between shaft A and shaft B, resisted by the spring-coupling C, will cause a relative turning of shaft, A and shaft B, and the same relative turning of the said second bushing or nut E and shaft B. The amount. of this. turning from position with Zero torsion is proportional to the torsion between the said shafts, and therefore the amount of the consequent rectilinear motion of the said second bushing or nut E from its position with zero torsion is likewise proportional to the amount of said torsion be tween shaft A and shaft B.

L is a friction cone pulley. M'is the said auxiliary wheel, a friction wheel, and driven.

part of said cone L which drives the said wheel M. N is a lever which transmits the rectilinear motion of said second bushing or nut E to the cone pulley L, the motion transmitted being rectilinear, in line with the cone axis, and proportional in amount to the rectilinear motion of said second bushing or nut E, and therefore to the torsion between shaft A and shaft B.

The wheel M is free to move at right angles to its axis, but cannot move in the direction of its axis. With zero torsion between shaft A and shaft B the bearing position of wheel M is at the apex of the cone L. As the tional to the torsion between shaft A and shaft B. The cone pulley L is driven by belt from shaft B to the feathered pulley P. This feathered pulley P cannot move rectilinearly, but its feather fitting into a slot Q in the shaft R of the cone pulley L, permits motion of the cone pulley L and its shaft R as above described. The velocity of the cone pulley L is thus proportional to the common velocity of shaft A and shaft B and the distance from the apex of cone L to that part of cone L which drives the wheel M is proportional to the torsion between shaft A and shaft B. This condition produces a velocity in said Wheel M constantly proportional to the power transmitted from one of said shafts to the other.

Claim.

In measuring, continuously recording, or integrating the power transmitted to or from a revolving shaft, an apparatus comprising a spring-coupling between two revolving shafts, said shafts hereinafter called shaft A and shaft B; a bushing fixed to shaft B, having upon its outer surface a screw thread meshing into a corresponding screw thread on the inner surface of a second bushing or nut kept from turning relatively to shaft A by fixed arms, the outer ends of which fit into slots in a bushing fixed upon shaft A, the arrangement being such that any relative turning of shaft A and shaft B will cause an equal relative turning of shaft B and the said second bushing or nut, and consequently a rectilinear motion of said second bushing or nut along shaft B proportional to the amount of relative turning between shaft A and shaft B; suitable means to transmit said rectilinear motion of said second bushing or nut to a cone pulley, the motion thus transmitted being rectilinear, in line with the cone axis and proportional in amount to the said rectilinear motion of the said second bushing or nut; suitable means to give said cone a turning velocity proportional to the common turning velocity of shaft A and shaft B; a wheel driven by said cone, placed so that the distance from the said cones apex to that part of the cone which drives said wheel shall vary proportionally with the amount of rectilinear motion of said second bushing or nut, and therefore vary proportionally with the amount of relative turning of shaft A and shaft B, so that the turning velocity of said wheel, being proportional to both shaft torsion and shaft velocity, shall be proportional to the power transmitted by said shaft.

WM. J. CROWELL, JR.

Witnesses:

J 0s. LINSCERT, CARLOS T. CHESTER. 

